A gym bag is a type of bag designed to carry workout gear and personal items to and from the gym. Typically made from durable materials, gym bags come in various sizes and styles, including duffel bags, backpacks, and tote bags. They often feature compartments for organizing items like shoes, clothing, and water bottles. Many gym bags also include additional features such as padded straps for comfort, ventilation for sweaty clothes, and pockets for valuables. Popular brands like Nike, Adidas, and Under Armour offer a range of options to suit different preferences and needs.